Events May 1 — Battle of Cresson: Saladin defeats the crusaders. July 4 — Battle of Hattin: Saladin defeats Guy of Lusignan, King of Jerusalem. September 20 — October 2 — Siege of Jerusalem: Saladin captures Jerusalem. October 21 — Pope Gregory VIII succeeds Pope Urban III as the 173rd pope. October 29 — Pope Gregory VIII issues the bull Audita tremendi, proposing the Third Crusade. December 19 — Pope Clement III succeeds Pope Gregory VIII… (More on 1187)